RE: [R] fast mkChar

2004-06-09 Thread Vadim Ogranovich
ard [mailto:[EMAIL PROTECTED] > Sent: Tuesday, June 08, 2004 3:35 PM > To: Vadim Ogranovich > Cc: R-Help > Subject: Re: [R] fast mkChar > > "Vadim Ogranovich" <[EMAIL PROTECTED]> writes: > > > I am no expert in memory management in R so it's hard

Wrong question [Wasn't: Re: [R] fast mkChar]

2004-06-09 Thread Matej Cepl
On Wednesday 09 of June 2004 09:52, you wrote: > This is my first message to the list and I believe the question > I am including is a simple one. http://www.r-project.org/posting-guide.html -- Matej Cepl, http://www.ceplovi.cz/matej GPG Finger: 89EF 4BC6 288A BF43 1BAB 25C3 E09F EF25 D964 84AC

Reshaping matrix (was: [R] fast mkChar)

2004-06-09 Thread Duncan Murdoch
On 09 Jun 2004 09:52:27 -0400, Paulo Nuin <[EMAIL PROTECTED]> wrote : >Hello everyone > >This is my first message to the list and I believe the question I am >including is a simple one. > >I have a matrix where I need to calculate ANOVA for the rows as the >columns represent a different treatment.

RE: [R] fast mkChar

2004-06-09 Thread Paulo Nuin
Hello everyone This is my first message to the list and I believe the question I am including is a simple one. I have a matrix where I need to calculate ANOVA for the rows as the columns represent a different treatment. I would like to know if there is a command or a series of commans that I can

Re: [R] fast mkChar

2004-06-08 Thread Peter Dalgaard
"Vadim Ogranovich" <[EMAIL PROTECTED]> writes: > I am no expert in memory management in R so it's hard for me to tell > what is and what is not doable. From reading the code of allocVector() > in memory.c I think that the critical part is to vectorize > CLASS_GET_FREE_NODE and use the vectorized v

RE: [R] fast mkChar

2004-06-08 Thread Vadim Ogranovich
08, 2004 1:23 PM > To: Vadim Ogranovich > Cc: R-Help > Subject: Re: [R] fast mkChar > > "Vadim Ogranovich" <[EMAIL PROTECTED]> writes: > > > Hi, > > > > To speed up reading of large (few million lines) CSV files I am > > writing custom

Re: [R] fast mkChar

2004-06-08 Thread Duncan Murdoch
On Tue, 8 Jun 2004 12:23:58 -0700, "Vadim Ogranovich" <[EMAIL PROTECTED]> wrote : >Hi, > >To speed up reading of large (few million lines) CSV files I am writing >custom read functions (in C). By timing various approaches I figured out >that one of the bottlenecks in reading character fields is t

Re: [R] fast mkChar

2004-06-08 Thread Peter Dalgaard
"Vadim Ogranovich" <[EMAIL PROTECTED]> writes: > Hi, > > To speed up reading of large (few million lines) CSV files I am writing > custom read functions (in C). By timing various approaches I figured out > that one of the bottlenecks in reading character fields is the mkChar() > function which o

[R] fast mkChar

2004-06-08 Thread Vadim Ogranovich
Hi, To speed up reading of large (few million lines) CSV files I am writing custom read functions (in C). By timing various approaches I figured out that one of the bottlenecks in reading character fields is the mkChar() function which on each call incurs a lot of garbage-collection-related overh